Daikin VRV W T-series - Error Codes: Overview

10 Troubleshooting
Installation manual
46
RWEQ96~432TAYCU
VRV W T-Series water-cooled system air conditioner
4P540122-1B – 2018.11
10.3 Error codes: Overview
Malfunction code
Contents Solution
Main
code
Sub code
Master/sub 1/sub 2
E3
01/03/05 ▪ Highpressureswitchisactivated. 
(S1PH)-A1P(X3A)
▪ Highpressureswitchconnectorsaredetached.
-A1P(X3A)
▪ Checkstopvalvessituationorabnormalitiesin
(field) piping or waterflow.
▪ Securely connect each connector. Refer to the wiring
diagram attached to the back of the control box cover.
02/04/06 ▪ Stopvalvesareclosed.
▪ Refrigerantovercharge.
▪ Openstopvalves.
▪ Checkrefrigerantamountandrecharge.
E4
01/02/03 Lowpressuremalfunction:
▪ Stopvalvesareclosed.
▪ Refrigerantshortage.
▪ Indoorunitmalfunction
▪ Openstopvalves.
▪ Checkrefrigerantamountandrecharge.
▪ Check the user interface’s display or transmission
wiring between the outside unit and the indoor unit.
E9
01/05/08 Electronic expansion valve malfunction
(Y1E)-A1P(X21A)
Check connection on printed circuit board or actuator.
03/06/09 Electronic expansion valve malfunction
(Y2E)-A1P(X22A)
Check connection on printed circuit board or actuator.
04/07/10 Electronic expansion valve malfunction
(Y3E)-A1P(X25A)
Check connection on printed circuit board or actuator.
F3
01/03/05 Discharge temperature too high (R12T):
▪ Stopvalvesareclosed.
▪ Refrigerant shortage.
▪ Open stop valves.
▪ Check refrigerant amount and recharge.
20/21/22 Compressor casing temperature too high (R13T):
▪ Stop valves are closed.
▪ Refrigerant shortage.
▪ Open stop valves.
▪ Check refrigerant amount and recharge.
F6
02 ▪ Stop valves are closed.
▪ Refrigerant overcharge.
▪ Open stop valves.
▪ Check refrigerant amount and recharge.
H9
01/02/03 Temperature sensor malfunction
(R1T)-A4P(X11A)
Check connection on printed circuit board or actuator.
HJ
01/02/03 Water system malfunction ▪ Checkwaterpumpandwaterow.
▪ Checkowswitchinterlockconnection(X2M
terminals 5, 6).
J3
16/22/28
17/23/29
56/57/58
Temperature sensor malfunction
(R12T)-A1P(X19A)
Check connection on printed circuit board or actuator.
47/49/51
48/50/52
Temperature sensor malfunction
(R13T)-A1P(X19A)
Check connection on printed circuit board or actuator.
J5
01/03/05 Temperature sensor malfunction
(R3T)-A1P(X30A)
Check connection on printed circuit board or actuator.
J6
01/02/03 Temperature sensor malfunction
(R7T)-A1P(X30A)
Check connection on printed circuit board or actuator.
J7
01/02/03 Temperature sensor malfunction
(R6T)-A1P(X30A)
Check connection on printed circuit board or actuator.
06/07/08 Temperature sensor malfunction
(R8T)-A1P(X29A)
Check connection on printed circuit board or actuator.
18/19/20 Temperature sensor malfunction
(R11T)-A1P(X18A)
Check connection on printed circuit board or actuator.
J9
01/02/03 Temperature sensor malfunction
(R5T)-A1P(X30A)
Check connection on printed circuit board or actuator.
17/18/19 Temperature sensor malfunction
(R2T)-A4P(X12A)
Check connection on printed circuit board or actuator.
JA
01/02/03 High pressure sensor malfunction
(S1NPH)-A1P(X32A)
Check connection on printed circuit board or actuator.
JC
01/02/03 Lowpressuresensormalfunction
(S1NPL)-A1P(X31A)
Check connection on printed circuit board or actuator.
LC
01/06/08 Transmission trouble.
A3P(X6A)-A1P(X28A)
Check connection.
P1
01/02/03 Unbalanced power supply voltage. Check if power supply is within the range.
U1
01/05/07 No power supplied to outside unit or indoor unit
(Reverse phase/open phase).
Check if the power supply wiring for the outside unit
or indoor unit is correctly connected, and correct if
necessary.